add error message, quit cmd
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e770fe6d29
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656acfaa0d
52
regex.tal
52
regex.tal
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@ -34,7 +34,7 @@
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%space { #20 emit }
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%newline { #0a emit }
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%print { debug newline }
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%error! { #00 #00 DIV }
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%quit! { #01 #0f DEO BRK }
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( test -> )
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@ -63,7 +63,19 @@
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;test6 ;graph1 ;match JSR2 ;emit-byte JSR2 newline
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;test7 ;graph1 ;match JSR2 ;emit-byte JSR2 newline
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;test8 ;graph1 ;match JSR2 ;emit-byte JSR2 newline
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BRK
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quit!
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@error! ( msg* -> )
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LIT '! emit space
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&loop LDAk ,&continue JCN ,&done JMP
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&continue LDAk emit INC2 ,&loop JMP
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&done POP2 newline quit!
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@unknown-node-type "unknown 20 "node 20 "type 00
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@mismatched-parens "mismatched 20 "parenthesis 00
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@stack-is-full "stack 20 "is 20 "full 00
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@stack-is-empty "stack 20 "is 20 "empty 00
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@arena-is-full "arena 20 "is 20 "full 00
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@match ( str* regex* -> bool^ )
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;reset-stack JSR2
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@ -81,7 +93,7 @@
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LDAk #03 EQU ;do-literal JCN2
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LDAk #04 EQU ;do-or JCN2
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LDAk #05 EQU ;do-or JCN2 ( same code as the or case )
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error!
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;unknown-node-type ;error! JSR2
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@goto-backtrack ( -> bool^ )
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;stack-exist JSR2 ,&has-stack JCN ( do we have stack? )
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@ -180,7 +192,7 @@
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POP
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;parens LDA2 #0000 GTH2 ,&mismatched-parens JCN
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;unroll-stack JSR2 POP2 JMP2r
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&mismatched-parens error!
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&mismatched-parens ;mismatched-parens ;error! JSR2
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@c-or ( c^ -> r2* )
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POP
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@ -199,7 +211,7 @@
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;unroll-stack JSR2
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;push-next JSR2
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;compile-region-loop JMP2
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&mismatched-parens error!
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&mismatched-parens ;mismatched-parens ;error! JSR2
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@c-dot ( c^ -> r2* )
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POP
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@ -233,7 +245,7 @@
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@alloc3 ( mode^ -> r* )
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#0000 ROT ( 00 00 mode^ )
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#03 ;alloc JSR2 ( 00 00 mode^ addr* ) ( LIT 'a emit print )
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#03 ;alloc JSR2 ( 00 00 mode^ addr* )
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STH2k STA
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STH2kr INC2 STA2
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STH2r
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@ -324,7 +336,7 @@
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OVR2 OVR2 INC2 ;set-next-addr JSR2
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#0003 ADD2 ;set-next-addr JSR2 JMP2r
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&!4 LDAk #05 NEQ ,&!5 JCN #0003 ADD2 ;set-next-addr JSR2 JMP2r
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&!5 error!
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&!5 ;unknown-node-type ;error! JSR2
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@remove-addr ( target* addr* -> )
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LDA2k #0000 EQU2 ( t a v=0? ) ,&is-zero JCN
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@ -342,7 +354,7 @@
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OVR2 OVR2 INC2 ;remove-addr JSR2
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#0003 ADD2 ;remove-addr JSR2 JMP2r
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&!4 LDAk #05 NEQ ,&!5 JCN #0003 ADD2 ;remove-addr JSR2 JMP2r
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&!5 error!
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&!5 ;unknown-node-type ;error! JSR2
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( test cases -------- )
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@ -381,14 +393,14 @@
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( stack operations ---- )
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@push4 ( str* regex* -> )
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;assert-avail JSR2 ( check for space )
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;assert-stack-avail JSR2 ( check for space )
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;stack-pos LDA2 #0002 ADD2 STA2 ( cell[2:3] <- regex )
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;stack-pos LDA2 STA2 ( cell[0:1] <- str )
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;stack-pos LDA2 #0004 ADD2 ;stack-pos STA2 ( pos += 4 )
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JMP2r
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@pop4 ( -> str* regex* )
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;assert-exist JSR2 ( check for space )
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;assert-stack-exist JSR2 ( check for space )
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;stack-pos LDA2 ( load stack-pos )
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#0002 SUB2 LDA2k STH2 ( pop and stash regex )
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#0002 SUB2 LDA2k STH2 ( pop and stash str )
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@ -403,10 +415,10 @@
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;stack-pos LDA2 ;stack-top LTH2 JMP2r
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@stack-exist ( -> bool^ )
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;stack-pos LDA2 ;stack-bot GTH2 JMP2r
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@assert-avail ( -> )
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;stack-avail JSR2 ,&ok JCN error! &ok JMP2r
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@assert-exist ( -> )
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;stack-exist JSR2 ,&ok JCN error! &ok JMP2r
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@assert-stack-avail ( -> )
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;stack-avail JSR2 ,&ok JCN ;stack-is-full ;error! JSR2 &ok JMP2r
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@assert-stack-exist ( -> )
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;stack-exist JSR2 ,&ok JCN ;stack-is-empty ;error! JSR2 &ok JMP2r
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@emit-stack ( -> )
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space LIT 'n emit LIT '= emit ;stack-pos LDA2 ;stack-bot SUB2 #0004 DIV2 ;emit-short JSR2 LIT ': emit
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@ -428,10 +440,12 @@
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@alloc ( size^ -> addr* )
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#00 SWP ( size* )
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;arena-pos LDA2 STH2k ADD2 ( pos+size* {pos} )
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( TODO: ensure we don't exceed our space )
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;arena-pos STA2 ( pos <- pos+size )
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STH2r JMP2r ( return old pos )
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;arena-pos LDA2 STH2k ADD2 ( pos+size* [pos] )
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DUP2 ;arena-top GTH2 ( pos+size pos+size>top? [pos] )
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,&error JCN ( pos+size [pos] )
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;arena-pos STA2 ( pos += size [pos] )
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STH2r JMP2r ( pos )
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&error POP2 POP2r ;arena-is-full ;error! JSR2
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|1ffe
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@arena-pos :arena-bot ( the next position to allocate )
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@ -456,4 +470,4 @@
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&!2 LDAk #03 NEQ ,&!3 JCN #04 ;emit-n JSR2 ,&loop JMP
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&!3 LDAk #04 NEQ ,&!4 JCN #05 ;emit-n JSR2 ,&loop JMP
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&!4 LDAk #05 NEQ ,&!5 JCN #05 ;emit-n JSR2 ,&loop JMP
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&!5 error!
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&!5 ;unknown-node-type ;error! JSR2
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